fix ruff errors and remove isort and black #173

	name: pytest
	concurrency:
	group: ${{ github.workflow }}-${{ github.event.number }}-${{ github.event.ref }}
	cancel-in-progress: true
	on:
	pull_request:
	paths:
	- '**.py'
	push:
	branches: [main]
	paths:
	- '**.py'
	workflow_dispatch:

	jobs:
	pytest:
	timeout-minutes: 30
	strategy:
	fail-fast: false
	matrix:
	os: [ubuntu, macos, windows]
	python-version: ["3.9", "3.10", "3.11", "3.12"]
	# some tests fail (numerical issues) in older python on mac, so we ...
	exclude:
	- os: macos
	python-version: '3.9'
	name: ${{ matrix.os }} - py${{ matrix.python-version }}
	runs-on: ${{ matrix.os }}-latest
	defaults:
	run:
	shell: bash
	steps:
	- name: Checkout repository
	uses: actions/checkout@v4
	- name: Setup Python ${{ matrix.python-version }}
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install package
	run: \|
	python -m pip install --progress-bar off --upgrade pip setuptools wheel
	python -m pip install --progress-bar off .[test]
	- name: Display system information
	run: lapy-sys_info --developer
	- name: Run pytest
	run: pytest lapy --cov=lapy --cov-report=xml --cov-config=pyproject.toml
	- name: Upload to codecov
	if: ${{ matrix.os == 'ubuntu' && matrix.python-version == '3.10' }}
	uses: codecov/codecov-action@v4
	with:
	files: ./coverage.xml
	flags: unittests # optional
	name: codecov-umbrella # optional
	fail_ci_if_error: true # optional (default = false)
	verbose: true # optional (default = false)
	token: ${{ secrets.CODECOV_TOKEN }}
	slug: deep-mi/LaPy

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